function show(id) {
    if (document.getElementById) {
    document.getElementById(id).style.display="block";
    }
    else if (document.all) {
        document.all[id].style.display="block";
    }
    else if (document.layers) {
        document.layers[id].display="block";
    }
} 

function hide(id) {
    if (document.getElementById) {
        document.getElementById(id).style.display="none";
    }
    else if (document.all) {
        document.all[id].style.display="none";
    }
    else if (document.layers) {
        document.layers[id].display="none";
    }
}